Window screen



J. J. RITTER wmnow SCREEN July 2, 1929.

Filed March 12, 1928 Patented July 2, 1929.

UNITED STATES PATENT OFFICE.

Jenn anrrran, or Unease, e10, ASSIGNOR To THE w. e. MARVINlvmnuractrnanve company, or URBANA, OHIO, A conronarron or 011 10.

WINDOW Application filed March 12,

This invention relates to window screens, it more particularly relatingto a screen employing wire mesh stretched over a metal frame.

The object of this invention is to provide improved means for securingthe wire mesh to the frame.

A more specific object is to provide for securing the wire mesh to themetal frame by a series of tongues cut and bent from the frame so formedas to secure the wire mesh firmly in position without damage thereto.

In the accompanying drawings:

Fig. l is an elevation of the rear Side of a screen embodying theimprovements, the screen in this case being formed of two frames coveredwith wire mesh telescoping one with the other Fig. 2 is an end view. a i

Fig. 3 is a top plan view of a portion of the same. i a a r n a Fig. 4is a front elevation of a portion of one of the frames.

Fig. 5 is a rear elevation of a portion of one of the frames.

Fig. 6 is a section on the line 66 of Fig. 7.

Fig. 7 is an enlarged view of one of the frames and one fof the securingtongues.

Fig. 8 is an enlarged section on the line 8-8 of Fig. 4.

Fig. 9 is an enlarged section on the line 9-4) of Fig. l.

Fig. 10 is a view looking from the bottom of Fig. 7

Fig. 11 is a view looking from the bottom of Fig. 9.

Referring to the drawings, each section of the screen is formed of aframe, one indicated at A and the other at B, of sheet metal. Each frameis formed with two longitudinal top and bottom strips 1 and 2 connectedby vertical strips 3 and 4, the strips being connected together by spotwelding or in any other suitable manner to form rectangular shapedframes over which the wire mesh 5 is stretched and secured.

The improvement relates to the manner in which the wire mesh is securedto the longitudinal strips. Each longitudinal strip is punched to form aseries of tongues 6, the punehings forming openings in the strips 1having straight vertical sides and a straight lower edge with thetongues projecting from the upper edge. Heretofore in securing wire meshto metal frames by integral tongues SCREEN.

1928. Serial No. 260,997.

struck from the frame it has been the usual practice to first bend thetongues away from the frame, insert the edges of the mesh be neath thetongues and then bend the tongues back to the original position to clampthe edges of the screen in position. This has resulted, however, in manyinstances in the edges of the tongues coacting with the edges of theopenings formed by the punching operation to shear the wire mesh atthose points. To overcome this difficulty, each tongue .in the presentcase has been so formed that when the tongue is bent back to clampingposition its edges stand away from the edges of the opening and thetongue engages the wire mesh only at one point, that point being at thetop of the tongue which is removed from the adjacent edge of the openingso that no shearing action can take place. To that end the tongue isbent so it forms an obtuse angle as indicated at. 7 in Figs. 8 and 9,and the outer portion thereof is also. bent so that it will be of aslightly concave convex form so as to provide a rounded central nose asindicated at 8. The result of this is that when the tongue is pushed toclamping position the rounded nose 8 only engages the wire mesh, thispoint of engagement being at a place removed from the lower edge 10 ofthe; opening 11 as shown best in Fig. 8. As shown best in Figs. 9 and11, the side edges of the tongue will be completely out of engagementwith the wire mesh so that no shearing action between the side edges ofthe tongue and the side edges of the opening can take place.

By this arrangement the wire mesh is securely fastened in position tothe metal frames in a manner which will eliminate all danger of the meshbeing sheared or severed by the tongues when the tongues are bent toclamping position.

The ends of the wire mesh are secured to the ends 3 and 4 of the frameby small lugs 12 formed integrally with the outer edge of each end framepiece, which lugs are bent over the ends of the sheet of wire mesh asshown.

The tongues 6 it will be seen are struck from an intermediate portion ofeach of the longitudinal frame pieces 1 and 2 which leaves the outeredges of each of these frame pieces free to be formed as shown in Fig. 2so that the frames can be slidably connected together. It will beobserved that the enter edge of each of the longitudinal frame members land 2 of the frame A is bent at right angles to form a flangel8, theouter edge of theflange beingbent inwar lly to form atongue 14. Theouter edge of each of the longitudinal frame members 1 and 2 r of theframe B is bent to form a channel metalhaving integral tongues. punchedfrom the'inetal of two opposite sides thereof to secure wire mesh tosaid sash, each tongue being shaped such that its edges, when the tongue1's in clamping position, Wlll he 1n spaced relation with the walls ofthe open mg formed by the punching operation, with the tip of the tongueonly engaging the wire mesh and clamping the same to the frame.

2. A screen sash formed of strips of sheet metal having integral tonguespunched from the metal of two opposite sides thereof to secure wire meshto said sash, each tongue being bent to concavo-convex form incrosssection and also bent near its base at an obtuse angle whereby its,edges, when said tongue IS in clamping pos tion, will lie in spacedrelatlon wlth the walls of the opening formed by the punching operation,with the central portion only of the tip of the tongue engaging the wiremesh and clamping the same to the frame.

3. A screen sash formed of strips of sheet metal. having integraltongues punched from the metal of two opposite sides thereof to securewire mesh to said sash, each tongue being bent to concavo-convex form incrosssection with the face adjacent the wire mesh convex and theopposite face concave and also bent near its base at an obtus! angle,whereby its side edges and tip, when said tongue is in clampingposition, will he in spaced relation with the walls of the openingformed by the punching operation, with the tip of the tongue engagingthe wire mesh and clamping the same to the frame.

4. A screen sash formed of strips of sheet metal presenting verticalfaces, integral tongues punched from intermediate portions of metal oftwo opposite sides of said frame to secure wire mesh to said sash, eachtongue being bent to concavo-eonvex form in crosssection with the innerside thereof of convex form and also bent at its base away from thesurface of the frame whereby when the tongue is in clamping position thecentral portion of the tip only thereof will cooperate with the frame toengage the wire mesh. i

In testimony whereof, I have hereunto set my hand this 2nd day of March,1928.

JOHN J. BITTER.

